Integration Development

Integration Development

This skill provides guidance for creating OAuth-based integrations in Orient.

Integration Architecture

Orient uses a catalog-based architecture for integrations:

packages/integrations/src/
├── catalog/                    # Integration definitions
│   ├── linear/
│   │   ├── INTEGRATION.yaml    # Manifest
│   │   ├── oauth-config.ts     # OAuth configuration
│   │   ├── tools.ts            # API client and tools
│   │   └── index.ts            # Exports
│   └── github/
│       └── ...
├── types/
│   └── integration.ts          # IntegrationManifest types
└── index.ts                    # Package exports

Quick Start

1. Create directory: packages/integrations/src/catalog/<integration-name>/
2. Create INTEGRATION.yaml manifest
3. Create oauth-config.ts for OAuth flow
4. Create tools.ts for API client
5. Create index.ts for exports
6. Update package.json exports

File Templates

INTEGRATION.yaml

See references/manifest-template.md for the complete template.

Key fields:

• name: lowercase identifier (e.g., linear, github)
• title: display name
• description: 50+ character description
• version: semver (e.g., 1.0.0)
• oauth: authorization and token URLs, scopes
• requiredSecrets: CLIENT_ID, CLIENT_SECRET, etc.
• tools: available API operations
• status: stable, beta, or experimental

oauth-config.ts

Required exports:

• Scope constants (e.g., LINEAR_SCOPES)
• Default scopes array
• Config interface
• getAuthUrl() - generate authorization URL
• exchangeCode() - exchange code for tokens
• getUserInfo() - fetch user profile
• getConfigFromEnv() - load config from environment

tools.ts

Required exports:

• Type definitions for API responses
• Client class with API methods
• Factory function (e.g., createLinearClient())

OAuth Flow Patterns

Standard OAuth 2.0

Most services use standard OAuth 2.0:

// 1. Generate auth URL with state
const authUrl = getAuthUrl(config, scopes, state);

// 2. User authorizes in browser, redirected with code

// 3. Exchange code for tokens
const tokens = await exchangeCode(config, code);

// 4. Use access token for API calls
const client = createClient(tokens.accessToken);

OAuth 2.0 with PKCE

Some services require PKCE (Proof Key for Code Exchange):

// 1. Generate code verifier and challenge
const codeVerifier = crypto.randomBytes(32).toString('base64url');
const codeChallenge = crypto.createHash('sha256').update(codeVerifier).digest('base64url');

// 2. Include challenge in auth URL
const authUrl = `${baseUrl}?code_challenge=${codeChallenge}&code_challenge_method=S256`;

// 3. Include verifier in token exchange
const tokens = await exchangeCode(config, code, codeVerifier);

API Client Patterns

GraphQL APIs (Linear, GitHub GraphQL)

private async query<T>(query: string, variables?: Record<string, unknown>): Promise<T> {
  const response = await fetch(this.apiUrl, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Authorization: `Bearer ${this.accessToken}`,
    },
    body: JSON.stringify({ query, variables }),
  });

  const result = await response.json();
  if (result.errors?.length > 0) {
    throw new Error(`GraphQL error: ${result.errors[0].message}`);
  }
  return result.data;
}

REST APIs (GitHub REST, Slack)

private async request<T>(endpoint: string, options: RequestInit = {}): Promise<T> {
  const response = await fetch(`${this.apiUrl}${endpoint}`, {
    ...options,
    headers: {
      Authorization: `Bearer ${this.accessToken}`,
      Accept: 'application/json',
      'Content-Type': 'application/json',
      ...options.headers,
    },
  });

  if (!response.ok) {
    const error = await response.json().catch(() => ({ message: response.statusText }));
    throw new Error(`API error: ${error.message}`);
  }

  return response.json();
}

Logging Pattern

Always use the service logger:

import { createServiceLogger } from '@orient/core';

const logger = createServiceLogger('integration-name');

async function someOperation() {
  const op = logger.startOperation('operationName', { param1: value1 });

  try {
    const result = await doWork();
    op.success('Operation completed', { resultCount: result.length });
    return result;
  } catch (error) {
    op.failure(error instanceof Error ? error : String(error));
    throw error;
  }
}

Type Transformation

Transform API responses to camelCase:

// API returns snake_case
const apiResponse = {
  created_at: '2024-01-15',
  pull_request: { html_url: '...' },
};

// Transform to camelCase
const result = {
  createdAt: apiResponse.created_at,
  pullRequest: { htmlUrl: apiResponse.pull_request.html_url },
};

Required Secrets

Define all required secrets in the manifest:

requiredSecrets:
  - name: SERVICE_CLIENT_ID
    description: OAuth Client ID from developer settings
    category: oauth
    required: true
  - name: SERVICE_CLIENT_SECRET
    description: OAuth Client Secret
    category: oauth
    required: true
  - name: SERVICE_WEBHOOK_SECRET
    description: Webhook signing secret (optional)
    category: webhook
    required: false

Webhook Support

For integrations that support webhooks:

webhooks:
  events:
    - push
    - pull_request
    - issues
  signatureHeader: X-Hub-Signature-256
  signatureAlgorithm: hmac-sha256

Testing Integrations

1. OAuth flow: Test with real credentials in development
2. API calls: Mock API responses in unit tests
3. Token refresh: Test expiration handling
4. Error handling: Test API error responses

Common Pitfalls

1. Missing scopes: Always request all needed scopes upfront
2. Token expiration: Handle refresh tokens if provided
3. Rate limiting: Implement backoff for API errors
4. Pagination: Handle paginated API responses
5. Error messages: Parse API error details for useful messages

References

• references/manifest-template.md - Full INTEGRATION.yaml template
• references/oauth-providers.md - OAuth configuration for common providers